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Top 45 Next.js Interview Questions & Answers (2026)

45 Questions 28 Beginner 12 Intermediate 5 Advanced

About Next.js

This technology is widely used in software development and is a frequent topic in technical interviews at companies of all sizes.

What to Expect in a Next.js Interview

Interviews cover both foundational concepts and practical application of this technology, with questions ranging from definitions to architectural decision-making.

How to Use This Guide

Work through questions in order of difficulty to build your understanding progressively. Bookmark challenging questions and revisit them before your interview.

Curated by Tech Baithak Editorial Team · Last updated: May 2026

Beginner 28 questions

Core concepts every Next.js developer must know.

01 What is Next.js? 02 What is the difference between the Pages Router and App Router in Next.js? 03 What is file-based routing in Next.js? 04 What are React Server Components (RSC)? 05 What is the "use client" directive in Next.js? 06 What is the layout.tsx file in Next.js App Router? 07 What is page.tsx in Next.js App Router? 08 What is SSR (Server-Side Rendering) in Next.js? 09 What is SSG (Static Site Generation) in Next.js? 10 What is Incremental Static Regeneration (ISR) in Next.js? 11 What are Next.js API routes? 12 What are Server Actions in Next.js? 13 What is Next.js data fetching in the App Router? 14 What is Next.js Image optimization? 15 What is Next.js metadata and SEO? 16 What is Next.js middleware? 17 What is the Next.js loading.tsx file? 18 What is error.tsx in Next.js App Router? 19 What is dynamic routing in Next.js? 20 What is the next.config.js file? 21 What is the difference between client-side navigation and full page reload in Next.js? 22 What is the Next.js Font optimization? 23 What is Next.js environment variables? 24 What is the Next.js Script component? 25 What is the difference between useRouter in Pages Router vs App Router? 26 What is the Next.js Link component? 27 What is Next.js Turbopack? 28 What is Partial Prerendering (PPR) in Next.js?

Intermediate 12 questions

Practical knowledge for developers with hands-on experience.

01 How does Next.js caching work in the App Router? 02 What are Server Components vs Client Components trade-offs? 03 What is React Suspense and streaming in Next.js? 04 How do you implement authentication in Next.js? 05 What is Next.js App Router data fetching patterns? 06 What is the Next.js App Router folder structure and special files? 07 How does Next.js handle internationalization (i18n)? 08 What is the difference between Static and Dynamic rendering in Next.js App Router? 09 How does the Next.js build process work? 10 What is the Next.js App Router middleware in depth? 11 What are Next.js Server Actions best practices? 12 What is Next.js OpenGraph image generation?

Advanced 5 questions

Deep expertise questions for senior and lead roles.

01 How does React Server Components payload work? 02 What are Next.js deployment strategies and considerations? 03 How does Next.js handle bundle optimization? 04 What is the Next.js App Router parallel routes and intercepting routes? 05 How do you optimize Core Web Vitals in Next.js?

Back to All Topics 45 questions total